Coupling in an apparatus for extruding matter



Oct. 13, 1931. J. E. BOYNTON 1,826,725

COUPLING IN AN APPARATUS FOR EXTIRUDING MATTER Original Filed y 1929 3 Sheets-Sheet l Oct. 13, 1931. J. E. BOYNTON 1,326,725

COUPLING IN AN APPARATUS FOR EXTRUDING MATTER Original Filed May 31, 1929 3 Sheets-Sheet 2 mmm mm 6 lg 5/ i 5 E 4! 40 E /4d 5 5 QM A779 Oct. 13, 1931. T J. E. BOYNTON 1,826,725

COUPLING IN AN APPARATUS FOR EXTRUDING MATTER Original Filed May 31, 1929 3 Sheets-Sheet 5 III F x I .4 v- -a a;

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Patented Oct. 13, 1931 juNrrED STATES.

JOHN E. .BOYNTON, or OAK PARK, rumors, AssIGNoR j'ro .wns'rrinn ELECTRIC I PANY, INCORPORATED, 011*. NEVJ 1012K, 1v. Y., A CORPORATION or NEW r011 ;v

. c w-mm m AN APP RATUS ron E TRUDINGM A r'r-ER Original application'filed. may. 31, 1929,

apparatus for extrudingmatter, and more particularly to a method of and apparatus for extruding metals, andis a division of my copending application Serial No.'. 367204;, filed May 31, 1929. I I l An obje'ctof the invention is to provide im proved means for preventing leakage'between joined portions of apparatus employing very prises. improvements in the extruding. ma-

chine described in detail in Patent No.

1.720,759, issued July 16, 1929, to John E.

' the head member "allows the insertion of a pipe for the circulation of a cooling element 9 such as air for water; the matter extruded being solidified by this means toprevent leakage thereof through the joint made by the't'wo members; i

The intake passage for admitting extrudable matter to each pump is provided'iwith an improved intake valve wherein a valve memher is provided of lighter weight than an equal volume of jthe matterhextruded, the

valve member being thereby adapted to float to its seat to close the intake passage. The seat is provided within a member having a portion of cylindrical cross section, the lower portion thereof having a wedge-like or ij'eathcred edge. A conical gland is provided havinga port to permitpassage of matter therethroughso. that the member of cylindrical cross section may be forced with a wedge-like action between the gland and the side walls of the passageway to which the valve is adapted v to supply matter.

Other objects and features ofthe invention will becomeap'parent as the detailed descrip- 1930. Serial No. 433,870.

In its preferred form the invention com-- Serial no. 367,204. Divided and; thisliapplication' fiiea'nar'cl f'n tion progresses, reference being h ad to the accompanying drawings, wherein' v 1 1. is 'a side elevation, part of anextruding machine embodying the fea tures of the invention, 'part'of the view being cutaway?" Fig. 2-is' an enlarged vertical section of thatportion of the apparatus of Fig. 1' which has been cut away and shows one embodiment of apparatus for 'maintaining a definitepredetermined temperature in a portion; of the extruding machine; I

TKENT .oFF E. I

ly in section,

' Fig.3isa sectional'view ora baifiedro'rm of apparatus for maintaining a definite pre determined temperature such as wouldfbe. taken on the line 3 3 of Fig. 1 if'the apparatus were constructed to employ a modified type ofapparat'us;

Fig; 4 shows a tional View of the modified apparatus shown in Fig. 3, the section being taken on the line H of Fig. 3;

longitudinal c ntral ig. 5'is an enlargedisectional" View of the Fig. 6 is anenlarged sectionalviewofa Fig. '1, and i I 7 Fig.7 is a sectional view taken on the line 7'-7 ofFig;6.

portion of the mechanism shown; in section in Referrmg now to the accompanying drawings wherein like numerals designate similar I members throughout the several'i views, the reference numeral'lO, designates a base plate upon which is mounted the mechanism of an improved extruding machine embodying the main features of the invention. The main.

details of the mechanismtogether with the mode'otoperation correspond 'withthat; of

ments which'will be referred to more in detail hereinafter isthat'in-E the-prior machine,

the mechanism disclosed in the Boynton pattwelve cylinders are employed whereas in the standard 11 is held in spaced relation to a cylinder member 12 by a plurality of spacing rods 13 and tie rods 14, the cylinder member 12 and the standard 11 being held in an upright position by suitable means such as bolts 1515. A. shaft '17 leading to a suitable source of power (not shown) distributes the power evenly to a plurality of other shafts 18 by means of suitable bevel gears 19 secured to the several shafts. Each of the shafts 18 is supported by a plurality of bearings 20 which are suitably secured to the standard 11, and carry a pair of eccentrics 21 which function with eccentric straps 25 and eccentric rods 26 to suitably operate a plurality of plungers 27.

A plurality of ducts 30 are bored in the cylinder member 12 and cooperate with the plungers 27 to form the pumps which force the matter into the extruding chamber. A check valve 31 in each one of the ducts 3O prevents a back flow of extrudable matter and a valve member 32,which will be described more in detail hereinafter, permits a flow of the matter such as molten lead or lead alloy from a suitable source through suitable ducts to the ducts 30. A head member 33 is secured by suitable means to the cylinder member 12, an aperture being provided in the jointure to permit the insertion of a pipe 34 through which temperature regulating fluid may be passed for the purpose of solidifying any portions of the matter being extruded which may be forced within the joint between the a two members, to prevent leakage therethrough. The head member 33 is provided with an annular passage 35, which forms the main extrusion chamber of the machine, and a core tube assembly designated generally by the numeral 36 extends into the chamber and cooperates with a die member 37 which is secured to the head member 33 by a die holding nut 38' and may be adjusted longitudinally by a die block 39 to shape the material being extruded.

The mechanism is particularly adapted to the extrusion of lead or other similar metals or alloys which melt at a comparatively low temperature. As described in the Boynton patent referred to above. the material is pumped continuously in a liquid state and then solidified while in the extrusion chamber 35, the material being forced out through the extrusion opening in the form of a solid. WVhen employing the extruding mechanism for this purpose it maybe desirable to provide means whereby the head member 33 together with a portion of the material contained therein may be maintained at a definite predetermined temperature.

A structure is shown in Fig. 2 by means of which this can be accomplished, this structure being adapted for use where the head member 33 is analogous in structure to the formthereof shown in section in Fig. 1. In

this portion of the structure containers 40 and 140 surround the extruding head 33 and are adapted to contain a liquid with which the head member of the extruding mechanism will be cooled. A condenser designated. generally by the numeral 41 surmounts the containers 40 and 140 and is adapted to condense vapors arising from said containers by means of a plurality of ducts 42 extending obliquely through a condenser chamber 43, the ducts 42 being cooled by the circulation tl'ierethrough of a suitable cooling liquid. A passageway 45 is provided from the containers 40 and 140 and to the condenser chamber 43 for the purpose of permitting vapors arising from said containers to enter the condenser chamber, and a bifurcated pipe 46 is suitably positioned with respect to the condenser chamber to conduct the condensed vapor back to the containers 40 and 140. An L-shapeo chamber 47 partially encloses the condenser chamber 43, the ducts 42 extend ing from one portion of the L-shaped cham ber to another and being in communication therewith, there being, however, no interconnection between the condenser chamber 43 and the'L-shaped chamber 47 such as to permit liquid contained in the chamber 4'7 actually entering the chamber 43 but only into the ducts 42. A. vapor passageway 50 permits discharge of vapor from the liquid contained in the L-shaped member 47 and an indicator glass 51 suitably mounted with respect to the chamber indicates the amount of liquid contained therein.

The operation of the cooling mechanism described above is briefly as follows: Either or both of the containers 40 and 140 are filled to a suitable heightwith a liquid, the boiling point of which bears a predetermined relationship to, or may possibly coincide exactly with, the temperature sought to be maintained within the head member which is substantially the temperature at which the lead or other material will be extruded. he flow of hot extrudable matter through the chamber 35 causes a heating of the head member 33, the consequent boiling of the liquid within the containers 40 and 140 and the vaporization of a portion thereof, the resulting vapor arising into the condenser chamber 43. The uncondensed portion of the liquid within the containers 40 and 140 is prevented from exceeding the boiling temperature thereof by the liberation of the latent heat required for the vaporization of portions of the liquid. The vapor arising into the chamber 43 strikes against the relatively cool ducts 42 and is condensed, the resulting condensate flowing along the exteriors of the ducts 42 and being conducted again to the containers 40 and 140 in the original form of liquid through the pipe 46. The liquid contained within the L-shaped chamber 47 and the ducts 42 is preferably one that boils at a considerably lower temperature than the liquid within the con tainers and 140, and the heat required for the vaporization of this liquid can be employed to keep itat a sufiiciently low temper.

ature so that it will act to condense the vapor arising from the higher boiling point'liquid. When employing the extruding machine for the purpose of covering cable cores with a sheath otlead-antimony 'alloy,;the liquid used in the containers 40 and 140 may be n1- tro-benzol, ben La-lcohol, ethylbenzoate or any similar liquid which boils ,atapproximat-ely the temperature desired to be maintained. The liqui-dutilize-d in the L-shaped chamber 47 may be water. When employing two liquids having diiierent boiling temperatures with the construction shown and for the purpose indicated, substantially atmospheric pressures can be maintained throughout the Whole cooling system, the cooling effect being obtained solely byutilizing the heat of vaporization of the two liquids. 1 I i lVhen employing a mechanism of the class described itor the purpose of extruding metals or such other materials as must be handled underhigh pressures, itis necessary to preevent leakage infplaces whereportions of the mechanism are oined together.- In the e:-

trading mechanism described in the Boynton patent referred to above and in theimproved formthereof which the subject matter-[of the present invention, it is particularly desir able that the intakepassage and the check valve associated therewith be of such a nature as to positively prevent leakage therearound or back flow intothe source ofsupply ofthe', matter being handled. Figs. 6 and 7 show 7 enlarged viewsof ,the'valvular member re ferred to above and generally designated in Fig. 1 by the numeral 82. A member 55, a portion of which has substantially cylindri-' cal conformation, is provided with-a lower portion, individual sectionsa-long the .wall

. of which lower portion are wedge-like in shape. A gland member 56 having ports60" cooperates with the side wall of a recess in a portion of the cylinder member 12 to which the intake passage leads, to form a circular crevice into which the lower portion of the member is adapted to extend. The member 55 is preliminarily brought into position by means of bolts 57. A valvular member 58, which is shown in the accompanying drawings as a sphere, cooperates with a seat 59 to form a valve by meansof which the flow of liquid matter to the mechanism-may be controlled. A threaded portion ofthe member 61 permits a pipe-62 to be secured thereto,

the pipe 62 (F ig. 1) leading to a suitable scource of supply of liquid matter (not shown).

As. shown in-the accompanying drawing (Figs. 6 and '7), when the member 55 is brought into tight engagement between the gland 56. and the walls of the" ducts in the cylinder member 12, v whatever pressure is built up Within the bore 30 which constitutes the cylinder of the extruding pump by the forward-movement of the plunger 27', will actagainst; the lower face or" the gland 56' with the result that 'the'engagementi between the associated parts iscloser and any movement of gland 56 which may occurwillincrease the ell'e'ctiveneses of 'the seal. Inthis manner the force employed to extrude thematter is utilized to prevent leakage thereof. The ac.-

tion of the valvular member 58 is such'that when the piston 27' is-withdrawn onits return.

stroke the valvular member will drop tothe tip of the gland 56 as shown in a solid line position in Fig. 6. L This permits downward passage of matter around the valvular member58 and through the ports 60 in the gland .56. When the piston 27 begins its forward stroke the'valvular member 58, being of steel I or other material lighter than lead, will float to its seat '59 and whatever pressure is built up within the port 30 forces it more tightly against its seat until the return stroke of the piston 27. i

'Figs. 3, l, and 5 of the accompanying drawings show a .modified form of mechanism by meansof which the heat of vaporization of aliq'uid may be utilizedflto maintain selected portions of the extruding mechanism at' a V predetermined temperature. Referring particularly'to Fig. 4, the reference numeral 65 designates a head member of an extruding mechanism corresponding to the member 33 as shown in Fig. 1. The member 65 is provided with a recess in whichthecore tube assembly 3 6 may becontained and the member 65 may be secured tothecylinder member. 19.

*bysuitable means, atemperature controlling] pipe 34: being providedjfor the purpose of preventing leakage as described above. A chamber70. in the member 65 surmounted a dome-71, whichv is integral therewith, is

adapted tocontaina liquid which is'utilized to cool the head member 65, the dome 71 .func

tioning to receive thevapor arising from the liquid contained in the chamber 7 0.- The temperature of 'the liquid contained within I the chamber "('0 is regulated by controlling.

the pressure maintained within the dome 71,

a valve 75 being regulable to permit the. ex-

haust of vapor from the dome 71 when the pressure therein is beyond a predetermined amount, and a pressure gauge 7 6 is provided to furnish the operator with meanst'or learn ingthe pressure condition-within the dome temperature desired by employing the heat of vapor zat on of liquid contained therein,

liquid, and it furthermore desirable that the liquid be maintainedat a definite and uniform level.

Since the chamber 7 O is maintained atthe Duplicate mechanism is l it becomes necessary to 'resupply-it with I shown in the accompanying drawings for accomplishing this purpose, but since the two units are identical, for the purpose of simplifying the description, they will be described as a single unit. An auxiliary tank 80 positioned above the chamber and is adapted to contain a reserve supply of the liquid which is employed, a pipe 81 communicating therewith and leading to a source of supply of the liquid (not shown), and a valve 82 being provided therein to discontinue or permit the flow of liquid from the source of supply into the auxiliary tank as desired. Suitable means is provided such as an indicator glass 85 for the purpose of readily showing the amount of liquid within the auxiliary tank. A pipe 86 equipped with a valve 87 leads to a valve chamber 88 partly positioned within the dome 71 and a valve stem 90 (Figs. 4 and 5) which is actuated by a float 9i in cooperation with an a m 92 which is loosely pivoted at 93 'cooperates with the valve to stop the flow of liquid from the auxiliary tank 80 to the chamber 70 in a manner and for a purpose which will be described more in detail hereinafter. A vapor transmitting pipe 95 communicating with the upper portion of the tank 80, is provided with a valve 9-6 and terminates in a valve chamber 9'? which valve chamber is partially within the dome 'Tl and cooperates with a valve stem 98 which is controlled by the action of the arm 92 as described to close or open, as the case may be, the vapor passageway.

The mechanism functions in the following manner: when the level of the liquid within the chamber 70 is lowered, the float 91 is permitted to drop gravitationally and raise the valve stem 98 to permit the vapor pressure within the dome 71 to be extended to the upper portion of the auxiliary tank 80 through the pipe. 95. This creates a pressure above the liquid within the auxiliary tank 80 which corresponds with that above the liquid within the chamber 70. At the same time the valve stem 90 is lowe "ed, thereby permitting a flow of liquid from the tank 80 through the pipe 86, this being accomplished by gravity since the pressures within the tank and chamber have now become equalized. lVhen the liquid has reached its proper level the raising of the float 91 causes a seating of the two valves, thus discontinuing all ccmmunicat-ion between the auxiliary tank and the chamber 70. l Vhen it is necessary to replenish the liquid in the auxiliary tank 80 the valves 87 and 96 leading to one of the units are closed and a supply of liquid admit ed through the pipe 81 by opening the valve 82. When the liquid has reached a suiiicient height as indicated in the glass 85, the valve 82 is closed and the valves 87 and 9G reopened whereupon the the unit is again. in condition to function as described. It is obvious that while the liquid is being replenished in tank 80 of one of the units the opposing unit will function for the purpose and in the manner described. It is apparent that any suitable liquid may be used when employing a mechanism embodying the features described, but on account of the cheapness and ready accessibility of water, this liquid is preferred. Although good results may be obtained by employing the device with any class of extruding apparatus, particularly good results are obtained by utilizing it with the method of an apparatus for producing flux core solder described in my copending application, Serial No. 18,133, tiled March 25, 1925.

ll hen employing either type of cooling device utilizin the heat of vaporization; namely, either the device disclosed in Figs. 1 and 2 or the embodiment shown in Figs. 3, at and 5, it may be desirable for eiiicient operation of extruding machines to provide means for cooling the lead or other extrudable matter within the region of the die. To accomplish this result the die positioning member 39 may be formed with an annular chamber desig ted in the drawings by the numeral 1:59 i r the purpose of introducing cooling material at this point. The material introduced may vary depending upon the specific results desired without departing from the spirit and scope of the invention, and the material introduced therein may be either circulated or permitted to vaporize as desiredand consonant with the results to be obtained. It is preferable to employ water in the annular chamber 139 and maintain the water constantly at the boiling temperature by utilizing the heat of vaporization in the manner described in connection with the other portions of the mechanism. Any suitable inlets or outlets (not shown) may be provided, of course, to introduce the cooling material into the annular chamber.

When employing the improved extruding machine, which is the subject matter of the prese'ntinvention, it is ireferable that molten Q ad or other extrudable matter be introduced into the cylinders at a temperature only slightly above the melting temperature thereof so that the lead will have to be cooled only a slight amount before solidification before it is discharged from the extruding orifice. It is also desire le tha the temperature of U the lead be closely regulated so that too large a body of solid lead will exist in the extruding chamber 35 because obviously the power required in the extruding operation is greatly increased when the volume of solid lead is increased. The embodiment shown in Figs. 1 and 2 is of particular utility for this reason because the three places in which cooling material can be introduced, namely the containers 40 and 140 and the annular chaincontainers.

her 139 in the die positioning member 39, can be used in a number of ways. Forinstance, liquids having difierent boiling points may be used in eachioneof'th'e three containers in which event, of course, where a condenser is employed a difierent condenser would have to be used in connection with each one of the At other times," particularly when starting the machine, either one or vall of the containers 40 or 140 orthe annular chamber 139 may be drained in order to more fluid-tight relation, and a valve-positioned" within saidtubularmembe'r.

.In witnesswhereof, I hereunto subscribe my name this 1930. Y

accurately control the temperature of the lead or other extrudable matter. vIt is obvious that more heat must be conducted away from the machine after it'has been in operation for some time than when first starting. When the extruding operation first beginsall ofthe parts of the extruding machine absorb .heat

and after the'machine has been working for some time the parts which will absorb'heat and in addition thereto the friction of the lead and the heat generated by the work fore apparent.

of heat, which heat the extruding machine thereon generally, introduces another source must be designed to carry away. The advanj tage of a plurality of coolingmeansis there;

'ited accordingly only by the scope of the appended claims.

What 1s claimed 1s:

1. A coupling for fluid conduits, comprising a member provided with a recess com- 7 municating with one of the conduits, a tubular member movably mounted 1n said recess and provided with aninwardly tapering bore communicating with another condult, an apertured member seated 1n said recess and having an outer surfaceshaped to engage said i Y tapered bore in fluid-tight relation, ayoke en gaging-the tubularmember, and means for V urging the yoke toward'the apertured memtion. o V

2. A coupling for fluid conduits,comprismg a member provided with a recess com- .berto maintain the parts in fluidtight rela- V municating with one of the conduits, a tubu- 'la'r member movaloly mounted in said recess and provided with an outwardly tapering bore communicating with another conduit, an 7 apertured member seated in said recess and;

having an outer surface shaped toengag e said tapered bore in fluid-tight relation, a member engaging the tubularmember,meansfor urg i w apertured member to maintainfthe' parts in 1 ingthe lastmentioned member toward the th day of FebruaryA. D.;

JOHN BOYNTON. 

